/* $Id: Modesetting.cpp $ */
/** @file
 * VirtualBox Video driver, common code - HGSMI initialisation and helper
 * functions.
 */

/*
 * Copyright (C) 2006-2020 Oracle Corporation
 *
 * Permission is hereby granted, free of charge, to any person
 * obtaining a copy of this software and associated documentation
 * files (the "Software"), to deal in the Software without
 * restriction, including without limitation the rights to use,
 * copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following
 * conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 */

#include "WddmPortIo.h"
#include "VBoxVideoVBE.h"

/**
 * Check whether this hardware allows the display width to have non-multiple-
 * of-eight values.
 *
 * @returns true if any width is allowed, false otherwise.
 */
BOOLEAN VBoxVideoAnyWidthAllowed(void)
{
    unsigned DispiId;
    WRITE_SYSIO_USHORT((PUSHORT)VBE_DISPI_IOPORT_INDEX, VBE_DISPI_INDEX_ID);
    WRITE_SYSIO_USHORT((PUSHORT)VBE_DISPI_IOPORT_DATA, VBE_DISPI_ID_ANYX);
    DispiId = READ_SYSIO_USHORT((PUSHORT)VBE_DISPI_IOPORT_DATA);
    return (DispiId == VBE_DISPI_ID_ANYX);
}
